90745972 has 6 divisors (see below), whose sum is σ = 158805458. Its totient is φ = 45372984.

The previous prime is 90745961. The next prime is 90745973. The reversal of 90745972 is 27954709.

It can be written as a sum of positive squares in only one way, i.e., 90744676 + 1296 = 9526^2 + 36^2 .

It is a super-3 number, since 3×90745972³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90745973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11343243 + ... + 11343250.

Almost surely, 2^90745972 is an apocalyptic number.

It is an amenable number.

90745972 is a deficient number, since it is larger than the sum of its proper divisors (68059486).

90745972 is a wasteful number, since it uses less digits than its factorization.

90745972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22686497 (or 22686495 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 90745972 is about 9526.0680241115. The cubic root of 90745972 is about 449.3752185496.

The spelling of 90745972 in words is "ninety million, seven hundred forty-five thousand, nine hundred seventy-two".